Year	Percent
1999-01-01	92.1470
2000-01-01	87.4043
2001-01-01	86.6151
2002-01-01	86.8782
2003-01-01	86.9772
2004-01-01	86.7795
2005-01-01	87.4448
2006-01-01	88.0698
2007-01-01	93.9732
2008-01-01	89.7217
2009-01-01	89.0783
2010-01-01	100.0000
2011-01-01	93.1300
2012-01-01	93.5772
2013-01-01	93.2939
2014-01-01	92.9186
2015-01-01	74.2242
2016-01-01	74.5809